Alright so, I'm about to bite my screen at this point, this is driving me so mad.
Heres the function I want to replicate from Paint shop pro: Paste into selection.
Now you might say "but there is already a paste into selection in gimp?" but this does not function at all the same way...
For example, I have a piece of 30x30 pixel art, I open a different larger file, use the magic wand select to choose a large square area in the center of the card. I then want to simply choose paste into selection and have it resized to fit the LARGER area I have selected with the wand, without having to go through the current mess of steps where I paste it into the selection, it's still 30x30, so I have to resize the pasted image, then move it because it became off-center during the resizing, only to find out I didn't size it correctly, so it does not fit the area I need it to. Retry different percentage increase a few dozen times, scream and bash face into bed. repeat until nose bleeds.
I have about sixty pieces of art I need to do this for, and my (self imposed but still important) deadline is the end of this month.
I really hope there is some plugin that I can grab and make this as simple as it used to be on my old windows system (yeah, RIP.) or I'm just being an idiot and completely missing a command that is already in gimp which would let me do this.
Any help would be appreciated. Thanks.